VENEZUELA'S vice president is returning home from a visit with Hugo Chavez in Cuba and says the ailing president's condition remains "delicate" three weeks after his cancer surgery.

With rumours swirling that Mr Chavez had taken a turn for the worse, Vice President Nicolas Maduro said on Tuesday that he had met with the president twice and had spoken with him.

"He's totally conscious of the complexity of his post-operative state and he expressly asked us ... to keep the nation informed always, always with the truth, as hard as it may be in certain circumstances," Mr Maduro said in the prerecorded interview in Havana, which was broadcast on Tuesday night by the Caracas-based television network Telesur.

Both supporters and opponents of Mr Chavez have been on edge in the past week amid shifting signals from the government about the president's health. Mr Chavez has not been seen or heard from since the December 11 operation, and officials have reported a series of ups and downs in his recovery - the most recent, on Sunday, announcing that he faced new complications from a respiratory infection.

A TV grab showing Venezuelan Foreign Minister and Vice president Nicolas Maduro during an interview in Havana on January 1.

Mr Maduro did not provide any new details about Mr Chavez's complications during Tuesday's interview. But he joined other Chavez allies in urging Venezuelans to ignore gossip, saying rumours were being spread due to "the hatred of the enemies of Venezuela."

He didn't refer to any rumours in particular, though one of them circulating online had described Mr Chavez as being in a coma.

Mr Maduro said Mr Chavez faces "a complex and delicate situation." But Mr Maduro also said that when he talked with the president and looked at his face, he seemed to have "the same strength as always."

A woman reacts as people gather to pray for Venezuela's President Hugo Chavez at a church in Caracas.

"All the time we've been hoping for his positive evolution. Sometimes he has had light improvements, sometimes stationary situations," he said.

Mr Maduro's remarks about the president came at the end of an interview in which he praised Venezuelan government programs at length, recalled the history of the Cuban revolution and touched on what he called the long-term strength of Mr Chavez's socialist Bolivarian Revolution movement.

He mentioned that former Cuban President Fidel Castro had been in the hospital, and praised Cuba's government effusively. "Today we're together on a single path," Mr Maduro said.

Critics in Venezuela sounded off on Twitter while the interview was aired, some saying Mr Maduro sounded like a mouthpiece for the Cuban government. In their messages, many Chavez opponents criticised Mr Maduro for the dearth of information he provided, accusing him of withholding key details about Mr Chavez's condition.

Mr Chavez's political opponents have complained that the government hasn't told the country nearly enough about his health, and have demanded it provide the country with a full medical report.

Even some of his supporters say they wished they knew more.

"We're distressed by El Comandante's health," said Francisca Fuentes, who was walking through a downtown square with her grandchildren on Tuesday. "I think they aren't telling us the whole truth. It's time for them to speak clearly. It's like when you have a sick relative and the doctor lies to you every once in a while."

Mr Chavez has been fighting an undisclosed type of pelvic cancer since June 2011. He has declined to reveal the precise location of the tumours that have been surgically removed. The president announced on December 8, two month after winning re-election, that his cancer had come back despite previous surgeries, chemotherapy and radiation treatment.

"There's nothing we can do except wait for the government to deign to say how he is really," said Daniel Jimenez, an opposition supporter who was in a square in an affluent Caracas neighborhood.

Jimenez and many other Venezuelans say it seems increasingly unlikely that Mr Chavez can be sworn in as scheduled on January 10 for his new term. If he dies or is unable to continue in office, the Venezuelan Constitution says a new election should be held within 30 days.

Before his operation, Mr Chavez acknowledged he faced risks and designated Mr Maduro as his successor, telling supporters they should vote for the vice president if a new presidential election was necessary.

Mr Maduro didn't discuss the upcoming inauguration plans, saying only that he is hopeful Mr Chavez will improve.

The vice president said that Mr Chavez "has faced an illness with courage and dignity, and he's there fighting, fighting."

"Someone asked me yesterday by text message: How is the president? And I said, 'With giant strength,'" Mr Maduro said. He recalled taking Mr Chavez by the hand: "He squeezed me with gigantic strength as we talked."

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